Do you know about the rare herb?

Quest Text It's true! A dead beached fish the size of a house!
I'd never seen anything like it.

Summary Yes, I've heard that the herb is a cure for everything.
But it's hard to grow.
I heard that you need a special fertilizer for it,
and to make it you need to grind some kind of ore.
The ore is said to eat time, so can make the herb grow faster with that ore.
Apparently, the ore is very lightweight, and it shines so it's easy to spot.
At first I thought the whole thing is a lie
because Stejones NPC Knowledge is known for bluffing and stretching the truth...
But a lot of people have been coming to him to about the herb
Seeing all those people is starting to make me think
that the rumors might be true!